{"product_id":"gds3705","title":"GDS3705","description":"\u003cp\u003eThe \u003cstrong\u003eGrandstream GDS3705\u003c\/strong\u003e is a professional \u003cstrong\u003eIP Audio Door Access and Intercom System\u003c\/strong\u003e designed to provide secure facility access, two-way audio communication, and integrated security management for residential, commercial, and enterprise environments. It combines SIP-based communication, RFID access control, a keypad, alarm interfaces, and a durable metal enclosure in a single solution.\u003c\/p\u003e\n\u003cp\u003eThe GDS3705 features \u003cstrong\u003edual integrated microphones\u003c\/strong\u003e and a \u003cstrong\u003e2W HD loudspeaker\u003c\/strong\u003e with advanced Acoustic Echo Cancellation (AEC), providing clear two-way intercom communication. It supports SIP calls to IP phones and other compatible SIP endpoints, allowing visitors and staff to communicate directly through the organization's IP communication system.\u003c\/p\u003e\n\u003cp\u003eThe device includes a built-in \u003cstrong\u003e125KHz EM4100 RFID card reader\u003c\/strong\u003e and a \u003cstrong\u003e12-key metal keypad plus doorbell button\u003c\/strong\u003e, enabling secure keyless or PIN-based access. It also provides \u003cstrong\u003e2 alarm inputs and 2 relay outputs\u003c\/strong\u003e, along with \u003cstrong\u003eRS485 and Wiegand interfaces\u003c\/strong\u003e, allowing integration with electric locks, exit buttons, door sensors, alarm systems, and other access-control equipment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eIP-based audio door access and intercom system.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e4 SIP accounts and 4 lines\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDual integrated microphones.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2W HD loudspeaker\u003c\/strong\u003e with advanced Acoustic Echo Cancellation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAudio input range up to \u003cstrong\u003e1.5 meters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAudio output range up to \u003cstrong\u003e3 meters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBuilt-in \u003cstrong\u003e125KHz EM4100 RFID card reader\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports up to \u003cstrong\u003e2,000 RFID cards\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e12 metal keypad keys plus a metal doorbell button\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports SIP calls to IP phones and other SIP endpoints.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 alarm inputs\u003c\/strong\u003e for door sensors, exit buttons, and other security devices.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 relay outputs\u003c\/strong\u003e for electric locks, switches, and alarm devices.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports \u003cstrong\u003eRS485\u003c\/strong\u003e interface.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports \u003cstrong\u003eWiegand 26-bit input and output\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e10\/100Mbps Ethernet\u003c\/strong\u003e connectivity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIntegrated \u003cstrong\u003eIEEE 802.3af PoE\u003c\/strong\u003e for network connectivity and power.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWeather-resistant and vandal-resistant \u003cstrong\u003ezinc alloy metal housing\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIP66\u003c\/strong\u003e weather protection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIK09\u003c\/strong\u003e vandal-resistance rating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports voice codecs including \u003cstrong\u003eG.711 μ\/a-law, G.722, and G.729A\/B\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports \u003cstrong\u003eTLS and SRTP\u003c\/strong\u003e for secure communication.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports VLAN and QoS for optimized network and voice traffic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with \u003cstrong\u003eGDS Manager\u003c\/strong\u003e for centralized device and RFID card management.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with Grandstream IP phones, video phones, and Wave applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for wall-mounted and in-wall installations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOffice and corporate building access.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eResidential and apartment buildings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHotels and hospitality facilities.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSchools and educational institutions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWarehouses and industrial facilities.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRetail stores and commercial properties.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReception and entrance areas.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSecure employee and visitor 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